How to Calculate RSD

Calculate STD Deviation
••• Calculating payments image by Christopher Meder from

In statistics, RSD stands for relative standard deviation and is also known as the coefficient of variance. The RSD measures the precision of the average of your results. It can come in a percentage or as a basic numeral and be added or subtracted from your main measurement. For example, a standard deviation of 6% when your average result is 40 would mean that the vast majority of results fall between 34 and 46. Your result would read 40 +/- 6%. The smaller the calculated relative standard deviation is, the more precise the measurement is. It is often used in chemistry, and is fairly simple to calculate.

    Find your standard deviation. See the Resources offered below for detailed instructions on finding standard deviation.

    Find your average by adding together all of your results and dividing it by the number of results you had.

    Take the standard deviation and multiply it by 100.

    Divide the number you get in Step 2 by your average.

    Using this formula, if you have a standard deviation of 2 and a mean of 100, it would look like this: (2*100)/100, 200/100 = 2. Your relative standard deviation is 2%.

Related Articles

How to Calculate Cumulative Error in an Equation
How to Calculate the Total Error of Something
How to Solve for Range
How to Calculate Dispersion
How to Calculate Average Deviation From the Mean
How to Calculate Relative Dispersion
How to Calculate Cumulative Error in an Equation
How to Calculate Precision
How to Calculate Correlation
How to Calculate What Grade I Need on the Final
How to Determine a Sample Size Confidence Interval
How to Calculate the Midpoint Between Two Numbers
How to Calculate the Interquartile Range
How to Find a Z Score
How to Get the Average of Decimals
How to Calculate Trimester GPA
How to Calculate School Grades by Percentage
How to Find the Average of Integers
How to Calculate the Distribution of the Mean
How to Find Correlation Coefficient & Coefficient of...